text: //
  // ip/resolver_query_base.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  //
  // Distributed under the Boost Software License, Version 1.0. (See accompanying
  // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  //
  
  #ifndef ASIO_IP_RESOLVER_QUERY_BASE_HPP
  #define ASIO_IP_RESOLVER_QUERY_BASE_HPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include "asio/detail/config.hpp"
  #include "asio/ip/resolver_base.hpp"
  
  #include "asio/detail/push_options.hpp"
  
  namespace asio {
  namespace ip {
  
  /// The resolver_query_base class is used as a base for the
  /// basic_resolver_query class templates to provide a common place to define
  /// the flag constants.
  class resolver_query_base : public resolver_base
  {
  protected:
    /// Protected destructor to prevent deletion through this type.
    ~resolver_query_base()
    {
    }
  };
  
  } // namespace ip
  } // namespace asio
  
  #include "asio/detail/pop_options.hpp"
  
  #endif // ASIO_IP_RESOLVER_QUERY_BASE_HPP
  